GLX50
Dual Input Guitar Amplifier
with
Digital Signal Processing
User’s Guide
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GLX50 Guitar Amplifier with Digital Signal Processing
Congratulations!
You are now the proud owner of the Crate GLX50 guitar amplifier. This unique amplifier
allows two players to play simultaneously, making it perfect for students, band practices,
and live performances. An easy to operate DSP section lets you dial in a variety of digital
effects such as delay, flange, chorus and reverb. RCA inputs with a level control allow you
to play along with a compact disc, a tape, or a drum machine. The active electronic tuner
allows for perfect tuning and is switchable for use on either of the two channels.
Like all Crate products, your GLX50 amplifier is designed by musicians, and built using only
the best components. Extensive testing confirms that this amplifier is the absolute best it can be.
In order to get the most out of your new amplifier, we strongly urge you to read the infor-
mation contained in this manual before you begin playing.
And thank you for choosing
The Digital Signal Processor:
Crate’s Digital Signal Processing offers eight exciting digital effects, accessible through the
DSP Mode control. The effects are described below.
1
Bypass - no effect
2
3
4
5
6
7
8
9
Delay 1 - short delay effect
Delay 2 - long delay effect
Flange - light flanging effect
Chorus 1 - slow chorus effect
Chorus 2 - fast chorus effect
Chorus + Reverb - slow chorus with reverberation
Reverb 1 - small room reverberation
Reverb 2 - large hall reverberation
Use the Mode control to select the effect and the Level control to mix in the desired amount of
each effect.
3
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GLX50 Guitar Amplifier with Digital Signal Processing
The Front Panel:
NOTE: Channel A and Channel B are independent of each other up to the DSP and CD inputs.
The text below (#1–10) applies to both channels.
1. INPUT: Use this 1/4” jack to connect your guitar to the amplifier by means of a shielded instru-
ment cable.
2. TUNER A / TUNER B: Use this switch to assign the electronic tuner (#16) to Channel A (switch
in the out position) or Channel B (switch depressed).
3. CLEAN: Use this control to adjust the output level of the Clean channel.
4. CLEAN / OVERDRIVE: Use this switch to select the Clean channel (switch in the out position) or
the Overdrive channel (switch depressed).
5. OD GAIN: Use this control to adjust the Overdrive channel’s input signal gain. This control works
in conjuntion with the OD Level control (#9) to set the amount of distortion and the output signal level
of the Overdrive channel.
6. HIGH: Use this control to adjust the high frequency level of the output signal. This control has a
range of 27dB of boost or cut at 12kHz.
7. MID: Use this control to adjust the midrange frequency level of the output signal. This control has
a range of 20dB of boost or cut at 1.5kHz.
8. LOW: Use this control to adjust the low frequency level of the output signal. This control has a
range of 28dB of boost or cut at 40Hz.
9. OD LEVEL: Use this control to adjust the Overdrive channel’s output signal level. This control
works in conjunction with the OD Gain control (#5).
10. EFFECTS: Use this control to adjust the amount of digital effects applied to the output signal.
4
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GLX50 Guitar Amplifier with Digital Signal Processing
11. DSP MODE: Use this control to select one of the eight built-in digital effects. A listing of the effects is
printed below the control knob. A brief description of these effects is shown on page 3 of this manual.
12: DSP LEVEL: Use this control to adjust the output level of the digital effect: in its fully counter-
clockwise position the signal will be “dry” (without any effect). As you rotate the control clockwise the
amount of effect increases.
13. CD INPUT LEVEL: Use this control to adjust the input level of the signal from the CD Input jacks
(#14).
14. CD INPUT JACKS: Use these jacks to connect the output of a CD player, tape deck or drum
machine to the amplifier. The jacks are internally summed to create a mono signal.
15. HEADPHONES: Use these jacks to connect one or two pairs of stereo headphones to the ampli-
fier. Each Headphones jack monitors the signal from both Channel A and Channel B. The internal
speaker is disconnected when the Headphone jacks are used.
16. ELECTRONIC TUNER: The electronic tuner is active whenever the amplifier is turned on, pro-
viding constant, “real-time” tuning. The bottom row of LEDs indicate which note (string) is being
tuned. The top row of LEDs provides directional queues to facilitate quick and precise tuning of your
instrument. The indicated note (string) is properly tuned when only the center LED is illuminated.
17. LED: This LED illuminates when the amplifier is on.
18: POWER: Use this switch to turn the amplifier on (top of the switch depressed) and off (bottom of
the switch depressed).
5
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GLX50 Guitar Amplifier with Digital Signal Processing
Suggested Settings:
CRYSTAL CLEAN:
PUNCHY CLEAN:
DIRTY PUNCH:
DIRTY BLUES:
EDGIE:
OUT
OUT
IN
IN
IN
SWEATY METAL:
ARENA METAL:
MAMMOTH METAL:
IN
IN
IN
6
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GLX50 Guitar Amplifier with Digital Signal Processing
System Block Diagram:
CHANNEL A:
INPUT
OD
GAIN
OD
LEVEL
EFFECTS
LEVEL
HIGH MID LOW
CLEAN
OVER-
DRIVE
TUNER
BC EF
DSP
A
D
G
LEVEL
MODE
CHANNEL B:
INPUT
OD
GAIN
OD
LEVEL
EFFECTS
LEVEL
HIGH MID LOW
CLEAN
OVER-
DRIVE
POWER
AMP
SPEAKER
MIX
STAGE
CD
INPUTS
HEAD
PHONES
LEVEL
7
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GLX50 Guitar Amplifier with Digital Signal Processing
GLX50 TECHNICAL SPECIFICATIONS:
Output Power Rating
50 watts RMS @5% THD, 4 ohm load
5 volts peak-to-peak
Maximum Input Signal Accepted
Total System Gain
Clean Channel
70dB, all controls @10
110dB, all controls @10
Overdrive Channel
Input Impedance
Tone Controls
270k ohm
Low
Mid
28dB range @ 40Hz
20dB range @ 1.5kHz
27dB range @ 12kHz
High
CD Inputs
Maximum signal level 7.75V rms
Minimum impedance 32 ohms
Headphones
Internal Speaker
12” Crate Custom, 4 ohms, 1.5” voice coil,
30 oz. magnet
Input Power Requirements
Size and Weight
120 VAC, 60Hz, 75VA
100/115VAC, 50/60Hz, 75VA
230VAC, 50/60Hz, 75VA
19” H x 19-3/8” W x 9-1/2” D, 28 lbs.
The GLX50 is covered with a durable Tolex material: wipe it clean with a lint-free cloth.
Never spray cleaning agents onto the cabinet. Avoid abrasive cleansers which would damage the finish.
Crate continually develops new products, as well as improves existing ones. For this reason, the specifications
and information in this manual are subject to change without notice.
Declaration Of Conformity
#33, Effective 01-01-2001
Manufacturer’s Name:
Production Facility:
SLM Electronics
11880 Borman Drive, St. Louis, MO 63146, USA
700 Hwy 202 W, Yellville, AR 72687, USA
1400 Ferguson Ave., St. Louis, MO 63133, USA
1400 Ferguson Ave., St. Louis, MO 63133, USA
Production Facility:
Shipping Facility:
Office Facility:
Product Type:
Audio Amplifier
Complies with Standards:
LVD:
Safety:
EMC:
92/31/EEC, 93/68/EEC, & 73/23/EWG
EN60065
EN55013, EN55020, EN55022, EN61000-3-2,
& EN61000-3-3
Supplementary information provided by:
SLM Electronics - R & D Engineering
1901 Congressional Drive, St Louis, MO 63146, USA
Tel.: 314-569-0141, Fax: 314-569-0175
@2002 SLM Electronics, a division of St. Louis Music, Inc • 1400 Ferguson Avenue • St. Louis, MO 63133
47-383-01 • 110402
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